Christie Brinkley: Cook Used 'Overwhelming' Force with Kids

Christie Brinkley and Peter Cook's divorce proceedings took another nasty turn on Monday as the former supermodel accused her estranged husband of manhandling their children.

"At times he was too strong, too overwhelming with his use of force," she testified as the trial entered its custody phase. She added, that Cook got too rough with the kids "about a dozen times."

Brinkley, 54, and Cook, 49, are fighting over the custody of their two children, Jack, 13, and Sailor, 10. Brinkley told the courtroom that she was concerned with Cook's "use of force" with the children.

After the proceeding ended for the day, Cook's lawyer Norman Sheresky told PEOPLE that Brinkley's assertions are "outrageously untrue and completely belied by all her cards and interviews."

Norman was referring to heartfelt poems and letters that Brinkley admitted sending to her husband, as well as past press interviews where she spoke positively about Cook.

During her second day of testimony in an already hostile divorce trial, Brinkley told a story about how she once saw Cook forcing Jack up the stairs. She followed them, trying to get Cook to stop.